strandlund



ADJUSTABLE SUPPORT FOR COLTER SHANKS Filed Aug. 4, 1927 Y neously by tightening up on this bolt.

Patented Feb. 3, 1931 igeass UNITED vstares 'PATENT ori-ica CARL e. STR-ANDLUND, or MoLiNn, ILLINOIS, assieivon To nissan a coiviranv, or

MoLiNa'iLLrNois a CORPORATION or ILLrNois ADJUSTABLE sorron'r non course.. ,arianne application fiieaaugust 4, i927.' 'sei-iai noi merio. i. i

The present invention relates to improved means for mounting rolling colters, such as are employed on plows for cutting` down through sod and trash in advance o-f the plow point. Morespecifically, the invention aims to provide improved lsupporting means'for securing the shank of the colter to the plow beam or other part of the plow frame, which supporting means will have the two-fold characteristic of: first, permitting a wide Variety of adjustments of the colter shank and these to a relatively minute degree, for adaptingthe operation of the colter to all possible conditions; and, second, rigidly securing the y colter shank in firmly fixed positionVV solthat the stresses set up in the operation of the colter cannot loosen the adjustment or other- Wise disturb the desired setting of the colter. One of the features by which- I attain-the foregoing' comprises employing two lrelatively rotatable clamping plates havingcoo-perating radially toothed-surfaces which, by relative rotation therebetween, afford comparatively. coarse angular adjustments of the shank equal in angular extent to one or more teeth on the clamping surfaces; and suppleinenting this coarse adjustmentl by an arrangement which permits lthe rotatable clamping plate to be displaced angularly with respect to the colter shank, whereby relatively fine adjustments of less than the width of atooth can be obtained.

Another feature of the invention resides in the arrangement of the parts whereby all of the various adjustments of the colter shank are obtained and held" at one point.' For eX- ample, the longitudinal or endwise adjust- Y ment of the shank, its axial rotative adjustment, and the fore and aft angular adjustment of the shank are all held by one bolt. It is, therefore, possible to make all of the aforesaid adjustments at one point, and to thereupon set all-of` these adjustments simulta- Thus, V there is avoided the' objection of first. getting oneadjustment set to a nicety andthen losing this adjustment in endeavoring to" secure another.

Referring to the accompanying ydrawing the fork arms 12.

wherein I have illustrated a preferred embodimenty of my invention:

L'Fig. 1 isa fragmentary side elevational j view illustrating the colter and the present mounting means therefor. Y L

Fig. 2 is an elevational viewv of the toothed face of the stationary clamping plate.

Fig. 3 is a similar viewof the rotatable clamping plate. f

F ig. 4 lis a vertical sectional view tl'irough' the supporting device, taken on the plane of the line 1-4 o-f Figure'l, and

Figure 5 is a plan view of the device, loolry ing downwardly in Figure 1.

The plow beam or other corresponding part fof the plow structure is indicated at 7. The `present adjustable support, which has been designated 8 in its entirety, is secured to this plow beam in a manner which will hereinafter appear@ Carried by. such support isv the. colter shank 9, whiohhas a crank or offset portion 11 at its lower end. Rotatably Asupported on such offset portion is a yoke 12 in whichthe colter` disk 13 is journaled. Any

suitable collar or like means 14 may be pro-1 vided yfor holding theyoke 12 at a definite height on theY offset portion 11A of the colter shank, such collar' permitting the yoker to 1swivelfreely to' either side, so that the colter has -a caster wheel Amovement around theft lower end of the shank. Any suitable arrangement of pivot bolt 15 and bearing collars 16 may be provided for rotatably supporting the-colter between the lower ends'4 of The adjustable supportv 8 comprises two "fo y radially toothed plates 17 and 18, frequently referred to as rosettes.^ The plate 17 constitutes the stationary member of the pair, being vnon-rotatably held against the side of the plow beam '7 by an eye bolt 19. The

. shank of the eye bolt passes througha cential opening 21 in the plate 17, and through a hole '22 which is drilled in the web ofthe plow beam-at the desired point of mountingy of the Vsupporting device. The end of the bolt 19 receives a nut 23, which bears against a. conical or Ydepressed kwasher 24, shaped to conform to the lateral surface of the plow 1 beam. 'For positively restraining rotation of the plate 17, the latter is provided with two projecting lugs -25, preferably formed integral with the plate, and having laterally projecting flanges 26, which engage w therewith and extending over the outer sides of the flanges 26.

The outer face ofthe rotatable clamping plate 18 is formed with a diametrical groove 28 extending transversely across the saine. This groove is tapered to have the colter shank clamped therein, and as shown in Fig. 5, it will be noted that this groove is of a tapered formation so that the colter shank can be held therein in a wedging grip.'` The shank is drawn into wedging engagement in the groove 28 by the eye bolt 19. rfheeye portion 19 of the bolt has a loose iit in a. slot or elongated opening 29 in the center of the rotatable clamping plate 18. In assembling the device, the colter shank is 'passed up through the eye 19 and is alined with the groove 28. rJhereupon, by tightening up on the nut 23 on the outer end of theV eye bol the eye portion of the bolt is drawn inwardly in the elongated opening 29, and in consequence of the pull exerted by the bolt, the shank is drawn into rigid clamp engagement in the groove28. The pressure exerted laterally against the outer face of the rotatable plate 17 serves to clamp the toothed faces of the two plates together. It will be evident that by merely backing off the nut 23, the colter shank will be released for perv mitting any one or all of the aforesaid adjustments. Thus the shank can be raised or shifted longitudinally in the yeye 19 for changing the cutting depth of the colter. Also by axially rotating the shank in the eye 19', the lower oi'set portion 11 of the shank can be swung to right or left, so` as to shift the plane of travel of the colter laterally in any desired relation to the point of the plow. Finally, by rotating the revolvable clamping plate 18, the shank can be swung fore and aft through an arc having the axis of the bolt 19 as its center, thereby permitting the point of cutting'of the colter to be adjusted forwardly or rearwardly withl respect to the plow point.v and also affording an additional depth adjustment. Having given the colter shank its desir-ed setting in any one or all three of these adjustments,

tween the plates 17 and 18 can be no finer than the width of one tooth. Y The rearward thrust imposed on thecolter is comparatively heavy, and, accordingly, it is desirable that the teeth be constructed relatively wide and deep to withstand these pressures. On the other hand, it is frequently desirable to adjust the colter shank through a comparay tively small arc, narrower in width than the width of one of these teeth. Provision is made for these lineadjustmentsin the following manner:

`Both plates 17 and 18 are formed with the same number of teeth, but such number is an; odd number. For example in the construction shown, each plate is provided with twenty-five teeth although it will, ofcourse, be `understood that the plates may be provided with any desired number of teeth, so;y long as each plate has the same odd number of teeth. However, it is obvious that a number of teeth might be omitted from the rosettes midway between the positions indicated in AFigure 2 as d and o o-1c. 'Eachrosettemight, for example, have a set of teeth of approximatelyfive or six on one side and another set of live or six oppositely disposed from said first set. lith this arrangement the rosettes will still be operable to- A notnecessarily carry an odd number of teeth inasmuch as the essential characteristic of theV construction is that the ridges of the teeth on one side'of the rosette are diametrically disposed in alignmentwith the spaces or valleys formed between the teeth on the op` posite side of the rosette. y

Since this arrangement results in `each tooth lying diametrically opposite a tooth space or valley, around the entire face of the plate, assume now, that it is desired to effect"- an angular adjustment of less than the width of one tooth, and that the vtooth designated a on Ithe plate 18 has been engaging in the valley designated 7J in the plate 17. If the plate 18k lis rotated to bring the tooth'ainto registry with either of the valleys c to each side of the valley o, it will be' evident that the plate 18 will have been revolved through the widthof one full tooth. ,Howeveig if the plate'18can be revolved through 180 degrees without Vrequiring corresponding rotation of the colter shank, the` tooth a. can'be placed in one or thevother of the valleys (Z, with a resultant angular adjustment of the shank of the width of only half a tooth.-

' lll) tion. Vthe retightening of the nut 23 will firmly then revolve the vplate .p18 through fa halt revolution, whereuponby reengaging the.,

shank in the groove, the plate and shank can be o'iven an angular adjustment corresponding to the width ot only half a tooth. It will 'be apparent that this same manner et securing a tine adjustmentcan bev followed with the colter shank in any angular posi- Atter making such line adjustment,

clamp the shank in keach ot its adjustments, in the manner abovedescribed.

' H desired, the outer tace oi the rotatable clamping plate 1S may be provided with a second groove at right angles to the groove 2S for permitting the shank to beclamped in another angular position on the rotatable `clamping plate. 'It will be understood that in lieu of forming a groove or grooves in the clamping plate, the latter may be constructed with a suitable arrangement of lugs projecting from its outer face and forming shoulders substantially equivalent to the shoulder formed by the sides 01"' the groove 2S. v

Wlhile, for the purpose ofillustrating a specific embodiment, the invention has been shown in the form of an adjustable support for a colter shank, it will be understood that the essential features of the invention can be embodied in analogous supports tor any use. It will also be apparent that the approx-imately halt1 revolution adjustment, whichV has been described above as occurring between the colter shank and the-rotatable plate, may be made tocceur' etween therelatively stationary supportingmember and the relatively stationary plate.

1What claim as my invention and ldesire to secure by Letters Patent is: f

l. The combination with a relatively stationary member, and a. relatively `movable memberadapted to be mounted on .said relatively stationary member in different angular positions, et supporting means for connecting said members Vtogether comprising two toothed clamping plates adapted to be clamped together inA different angular positions with their teeth interlocked, the opposing surfaces of each ot said platesk having an odd number of radially extending teeth, one ot said plates being secured to one of said members, and means for securing the other Vot said plates to the other of said members in approximately diametrically opposite posi-y 'A tions, wherebythe latter plate/can berotaied relatively 'to the other plate through approxivmately a halt1 revolution to permit angular adjustments between said-,membersof less.

either end ot said groove whereby said rotatableJ clampingv plate can be revolved through,

approximately a lhalf yrevolution independently of said colter shank for obtaining langular adjustment of the shankof less than the width of one tooth on said plates.

An adjustable supportv for a colter shank comprising a radially toothed plate adapted for stationary mounting andvhaving anodd Y number' of teeth, a cooperating radially toothed plate also having anvodd numberot teeth Vand adapted for rotative. adjustment relative to .said stationary plate through, an are of approximately one hundred and eighty degrees, said rotatable plate having a groove extending dianietrically across its outerfface, and an eye bolt passing throughv said'plates, lthe colter shank being adapted to lie in said groove and extend through the eye of said bolt.

4. In combination, a clamping plate adapted for stationary mounting on a plow beam, va cooperating-clamping plate adapted for rotative adjustment relative to said stationary plate through an are of approximately one hundred and eighty degrees, each of said plates having the same odd number of radially 1- extending teeth formed in their clamping sur- `faces, an eye bolt passing centrally through said plates and through said plow beam and receiving a nut over its end on the opposite side of said plow beam, said rotatable platel having an`r enlarged opening thereinfor receivinglthe eye portion of said bolt,-a groove extending diametrieally across the outer tace yot saidrotatable plate, a colter shank having an offset lower end, an arm swivelled to said.v

offset lower end, and al colter pivotally supported onlsaid arm, saidcolter shank engaging 'in'said Vgrooveand extending through the eye ot-said bolt, said bolt clamping said "sha'nk lin said groove and clamping both of 'said plates together.

The combination with two members adapted to be connected together indiierent angular positions, ot supporting means for connecting said members together comprising two relatively rotatable. rosettes adapted to be clamped together, the opposing surfaces Y of said rosettes each having an odd num- 'teeth rosette being directly aligned with relation ber et' teeth thereon, and means for connectin(T said members to said rosettes whereby the odd numbers of teeth on said rosettes can be utilized, through rotation of one of said roset es through an arc of approximatelyone hundred and eighty degrees, to obtain tractional, tooth adjustments between .said members.

6. lnapparatus tor connecting two mem-V bers in ditiereiitadjusteo angular relationship, ytwo 'toothed plates adapted to be clamped together, one ot' said plates having at least one tooth on one side thereof and at least two teeth diametrically oppositeA with the`ridge of said first named tooth disposed in direct alignment with the valley formed between said latter two teeth, the teeth of the second plate being adapted to cooperate with the teeth Vot the first plate toV hold the said plates in adjusted position whereby when the second plate is turned substantially' a halt revolution relative to the member carrying it fractional tooth adjustments or" the said members may be enected, and means for clamping said plates together. A

7. The combination with -two members adapted to be connected together in different .angular positions, of supporting means tor connecting said members together, said means adapted to be connected together in different angular positions, 01"' supporting means for connecting said members together, comprising two relatively rotatable rosettes adapted lte be clamped together, the opposing surfaces of said rosettes each having a plurality ot thereon, the teeth at one side ot one to the spaces between the oppositely disposed teeth., so that fractional tooth adjustment between said rosettes may be obtained by rotating one ot said rosettes through an are oi" approximately 1S() degrees, and meanstor connectino' c4aid members to said rosettes.

The combination with two members be clamped together, the opposing surfaces ot said plates each having a plurality ofteeth thereon, certain teeth on each plate being arranged in aligned relationship to the valleys between z the diametrically oppositely disposed teeth, and means for connecting said members to said plates, whereby upon rotationol one of said plates through substantially lSOdegrees relative to the memberzto ,which it is connected, the members may be adjusted to an extent less than one tooth.

10. An adjustableV support for a colter shank loi' an implement, saidsupport comprising a plate having a plurality of teeth and adapted for stationary mounting on the implement, the teeth on said plate at one side thereeic being aligned with the hollow7 spaces between the opposite teeth at the other side of the plate, a cooperating radially toothed plate adapted for rotative adjustment through an arc of approximately 1,80 degrees relative to said stationary plate and arranged to be clamped thereto, shoulders on the other side of said rotatable plate, and means for securing the colter shank to said shoulders with the lower end of the shank extending from either one ot' two diametrically opposite points of said rotatable plate to permit fractional tooth adjustmentsI of said latter plate. y

ll. The combination with two members adapted to be secured together, of means for securing said members together in different angular adjustments, said means comprising a pair rof relatively movable disks having mutually cooperating serrations thereon, said pair of disks having means whereby they are connected respectively to said members, said means connecting oneY of said disks to the corresponding member in a plurality of positions, said serrations being disposed on each of said disks in a manner to allow said members to be relatively adjusted in an angular position equal to a fraction of a serration when said one disk is moved from one position to another.

`CARL STRANDLUND.

adapted to be connected together in different.

angular positions, of means for connecting said members together, said means comprising two relatively rotatable plates adapted to 

